Electric stop-motion for warring-machines



(No Model.)

J.-E. PREST. ELEGTRIG STOP MOTION FOR WARPING MACHINES. No. 424,997.

Patented Apr. 8, 1890.

WI V5 5 5 E 5 R6$Wmmxm UNITED STATES PATENT @EEICE.

JOHN E. PREST, OF NORTHBRIDGE, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 424,997, dated April 8,1890. Application filed February 20, 1889. Serial No. 300,532. (Nomodel.)

To col/Z whom it may concern.-

Be it known that I, JOHN E. PREST, of N orthbridge, in the county ofWorcester, State of Massachusetts, have invented a certain new andusefulImprovement in Electric Stop-Motions for WVarping-Machines, ofwhich the following is a description sufficiently full, clear,

and exact to enable any person skilled in the art or science to whichsaid invention appertains to make and use the same, reference being hadto the accompanying drawings, forming part of this specification,in'which Figure l is a diagram and partly sectional view illustratingthe position of the conducting-wires, magnet, and adj unctive mechanism;and Fig. 2, an elevation showing the drop-wire bar and a portion of thedrivingshaft and belt-shifter, the gears on the shaft being shown invertical section. I

Like letters and figures of reference indicate corresponding parts inboth figures of the drawings.

My invention relates to means for automatically stopping awarping-machine when an end or thread breaks; and it consists in certainnovel features, as hereinafter fully set forth and claimed, the objectbeing to produce a simpler, cheaper, and more effect ive device of thischaracter than is now inordinary use and one in which the drop-wiresshall be so pivoted and supported as to prevent clogging and imperfectaction resulting from accumulations of lint and dust about the pivotedportions thereof.

The nature and operation of the improvement will be readily understoodby all con versant with such matters from the following explanation.

In the drawings, A represents the drivingshaft, and B a pulley.

As the main parts of the warpingunachine are of the usual form, it isnot deemed essential to illustrate or describe them.

0 istlie drop-wire bar, formed with a longitudinal groove 2' in one sidethereof, as shown.

A metallic bar or plate h is disposed in the groove 1' in the wire-barO. This bar or plate is provided with perforated ears h, through which apintle-wire it passes, said ears being formed by slotting the bar orplate It. The dropwires f are supported by the metallic bar or plate 71,and are preferably pivoted i11- directly thereto between the ears h bymeans of the pintle-wire 72 A plate 75, attached to the drop-wire bar 0,partially covers the groove 2' in the side of said bar and holds the barh in place.

A l1orizontally-arranged metallic rod 12 is secured in standards (Z ofthe frame-work of the warper in position to be engaged by the drop-wireswhen they fall. The rod Z) is surrounded by an insulating substance 9 atits ends.

A wheel m is disposed loosely on the shaft A, its hub Z being providedwith an annular groove 19, in which the end of the lever q of anordinary belt-shifter plays. The wheel m is provided on its peripherywith broad radially-projecting flanges or teeth 0' and 011 the sideopposite its hub with an outwardlyprojecting eceentrically-tapering nosetwhich fits into a corresponding socket formed in a collet 12, securedto said shaft. A coiled spring to, disposed on the shaft between acollar 00 and the hub Z, acts expansively to hold the wheel m inengagement with the collet '2).

Pivoted to the frame of the warper is abar e, in such position that oneend y thereof may be made to engage the teeth 1 on the wheel on. Anordinary electro-magnet G is disposed above the opposite end 15 of saidbar, which forms an armature therefor. A conductingwire F connects saidmagnet with one pole of an electric battery D, the opposite pole beingconnected by a wire E with the bar h, to which the drop-wires arepivoted, or with some metallic portion of the machine in contact withsaid bar. A wire H connects the rod (Z in front of said drop-wires withthe magnetG.

In the use of myimprovementthe wheel m, being held in engagement withthe fixed collet 1; by the spring to, revolves with the shaft A when themachine is running. Should a thread or end K become accidentally broken,the drop-wiref through which it passes will fall and come in contactwith the rod 12, thus closing the circuit in the wires E F II andcharging the magnet G. The end 15 of the pivoted bar will be at onceattracted to the magnetandthe end y thereof thrown down into engagementwith a tooth 0" on the Wheel m, at once checking the same. Said. wheelbeing geared into the collet o by the eccentric nose t is forced outwardby said collet as it contin ues to revolve and carries with it the leverqof the belt-shipper,which is of the ordinary construction, and slipsthe (lriving'belt onto a loose pulley, thereby stopping the machine in amanner which will be readily understood withouta more explicitdescription. As soon as the drop-wire f is lifted from the red I) thecircuit is broken and the pivoted bar will fall away from the magnet,thus releasing the wheel on, the end 15 of said bar being eonstruetedsufficiently heavy to accomplish this. The spring 10 returns the wheelon into en gagement with the collet U as soon as the mechanism isstopped, in position to be again operated when a thread breaks. .Theteeth r on the wheel m are of such width that they will not disengagefrom the rod as said wheel slips outward on the shaft. By pivoting thedrop-wires to a bar or plate placed within a groove formed in the sideof the bar 0 the pivotal portions of the drop-wires are completelyshielded, and it is practically impossible for the drop-wires to becomeclogged at such portions by accumulations of dirt and lint.

I do not herein separately claim the supportingbar formed with thelongitudinal groove in the side thereof, in combination with the slottedplate placed in such groove and having the drop-wires pivoted thereto,inasmuch as such combination is claimed by me in my Letters Patent, No.-l()2,278, granted April 30, 1889, upon the application filed by meSeptember 17, 1888.

Having thus explained my invention, what I claim is- 1. The combinationof a horizontal dropwire bar provided with a longitudinal groove in oneside thereof, a metallic bar disposed in said groove, a series ofdrop-wires pivoted to said metallic bar and provided with threadeyes, ahorizontal metallic rod disposed adjajent to the drop-wires, againstwhich any of said wires fall when released by the breaking of a thread,an electric circuit having one pole connected with said bar and theother pole connected with said rod, an electro-magnet, an armature forsaid electro-magnet, and a stop mechanism actuated by said armature whenthe circuit is closed by the dropping of one of the drop'wi res.

i. The combination of a warping-machine frame, a horizontal drop-wirebar supported in said frame and provided with a longitudinal groove inone side thereof, a metallic bar supported in the groove in thedrop-wire bar, a series of drop-wires pivoted to said metallic bar andprovided with thread-eyes, a source of electricity, a wire connectingsaid source with said horizontal metallic bar, an eleetrt magnet a wireconnecting said magnet with the source of electricity, an armature forsaid magnet, a stop mechanism actuated by said armature, a horizontalmetallic rod supported in said frame and insulated therefrom, said rodbeing disposed adjacent to said bar, whereby the drop-wires fall againstsaid rod when released by the breaking of the thread, and a wireconnecting said rod with the electro-magnet.

JOHN E. PRIEST.

Witnesses:

0. M. SHAW, K. DURFEE.

